See following slide for references
24 october , 2018
See following slide for references
Plot and code inspired by http://www.stat.ubc.ca/~jenny/STAT545A/block17_colorsGgplot2Qualitative.html http://www.stat.ubc.ca/~jenny/notOcto/STAT545A/examples/gapminder/data/gapminderCountryColors.txt https://www.gapminder.org/